There is a great deal of respect held and shown between the representatives of the visiting races, and between all of their crews.
It shows always, every time we see them together.
They have gatherings, ceremonies, celebrations.
They miss their loved ones as much as we do.
They endure sadness and loss.
Advanced races do celebrate the natural death of a loved one, in a way.
But they still are sad for the loss. Death is not ever a happy event.
But the advanced races have a much greater understanding of the nature of life and death and living again.
I think many people on Earth celebrate death, as advanced as we are, in a way. The passing or the end of suffering.
The Native Americans seem to celebrate death in appropriate circumstances.